Datasheet
MAX1763
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(CLK/SEL = ONB = FB = PGND = GND, ISET = REF, OUT = POUT, V
ONA
= V
AIN
= V
OUT
= 3.6V, T
A
= -40°C to +85°C, unless other-
wise noted.) (Note 8)
PARAMETER CONDITIONS MIN MAX UNITS
DC-DC CONVERTER
Input Voltage Range (Note 1) 5.5 V
M i ni m um S tartup V ol tag e ( N ote 2) I
LOAD
< 1mA, T
A
= +25°C 1.1 V
Frequency in Startup Mode V
OUT
= 1.5V 125 1000 kHz
Internal Oscillator Frequency CLK/SEL = OUT 0.75
1.25
MHz
Oscillator Maximum Duty Cycle
(Note 3)
80 91 %
E xter nal C l ock Fr eq uency Rang e 0.6 1.2 MHz
Output Voltage
V
FB
< 0.1V, CLK/SEL = OUT, includes load regulation
for 0 < I
LX
< 1.1A
3.17
3.38
V
FB Regulation Voltage
Adjustable output, CLK/SEL = OUT, includes load
regulation for 0 < I
LX
< 1.1A
1.215 1.270
V
FB Input Current V
FB
= 1.35V 100 nA
Output Voltage Adjust Range 2.5 5.5 V
Output Voltage Lockout
Threshold (Note 4)
Rising edge 2.00 2.30 V
ISET Input Leakage Current V
ISET
= 1.25V 50 nA
Supply Current in Shutdown V
ONB
= 3.6V, V
ONA
= 0V 10 µA
No-Load Supply Current, Low-
Power Mode (Note 5)
CLK/SEL = GND, AIN = OUT 200 µA
Gain Block Supply Current V
AIN
< (V
OUT
- 1.4V), gain block enabled 50 µA
DC-DC SWITCHES
POUT Leakage Current V
LX
= 0V, V
OUT
= 5.5V 10 µA
LX Leakage Current V
LX
= V
ONB
= V
OUT
= 5.5V, V
ONA
= 0V 10 µA
N-channel 0.13
Switch On-Resistance
P-channel 0.25
Ω
N-Channel Current Limit 2.0 3.4 A
P-Channel Turn-Off Current CLK/SEL = GND 10 240 mA
REFERENCE
Reference Output Voltage I
REF
= 0A 1.220 1.270 V
Reference Load Regulation -1µA < I
REF
< 50µA 15 mV
Reference Supply Rejection 2.5V < V
OUT
< 5V 5 mV
GAIN BLOCK
AIN Reference Voltage I
AO
= 20µA 910 970 mV
AIN Input Current V
AIN
= 1.5V ±30 nA
Transconductance V
AO
= 1V, 10µA < I
AO
< 100µA 5 16 mS
AO Output Low Voltage V
AIN
= 0.5V, I
AO
= 100µA 0.4 V
AO Output High Leakage V
AIN
= 1.5V, V
AO
= 5.5V 1 µA